<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form action="/userServlet" method="post">
        用户名: <input type="text" name="username"> <br>
        密码: <input type="password" name="password"> <br>
        <input type="submit" value="提交">
    </form>
</body>
</html>